- Oxygen, Lambda Sensor
- Exhaust Oxygen Sensor (O2 Sensor)
- Measures oxygen in the exhaust so the ECU can correct the air-fuel mixture
- Fenox "OS81012" - Not available
VW - Transporter, Golf, Passat, Multivan, Jetta; SEAT - Altea, Leon; AUDI - A3, A4; SKODA - Octavia, Superb; PORSCHE - Cayenne